<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>
    <script type="text/javascript" src="../js/react.development.js"></script>
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <script type="text/javascript" src="../js/prop-types.js"></script>
    <script type="text/babel">
        class Login extends React.Component{
            handleSubmit=(e)=>{
                e.preventDefault()
                const {username,password} = this
                console.log(username.value,password.value);
            }
            
            render() {
                return (
                    <form onSubmit={this.handleSubmit}>
                        用户名：<input ref={c=>this.username=c} type="text"/>
                        密码：<input ref={c=>this.password=c} type="text"/>
                        <button>提交</button>
                    </form>
                )
            }
        }
        ReactDOM.render(<Login/>,document.getElementById('test'))
    </script>
</body>
</html>